The Simpson Strong-Bolt 2 Wedge Anchor, 3/4 in. x 7 in., Zinc Plated is a high-performance wedge-type expansion anchor engineered by Simpson for demanding concrete and masonry fastening applications. Code listed for both cracked and uncracked concrete, this anchor is purpose-built to maintain reliable load-carrying performance even under seismic and high-wind conditions, making it a dependable choice wherever structural integrity cannot be compromised.

Key Features

• Dual undercutting embossments on each clip segment - enable secondary expansion should a crack form and intersect the anchor location, so the anchor continues to carry load even as the hole expands, preserving structural performance in unpredictable conditions.
• Code listed for cracked and uncracked concrete, and masonry applications - gives contractors and engineers the documentation needed for code-compliant installations across a broad range of concrete fastening projects without added guesswork.
• Optimized for seismic and high-wind conditions - means this wedge anchor is a reliable fastening solution in regions or structures subject to dynamic lateral forces, where ordinary anchors may fall short of code requirements.
• Carbon steel construction with zinc plated finish - provides a solid combination of mechanical strength and corrosion resistance suitable for concrete and masonry fastening environments.
• 3/4 in. drill bit diameter matches anchor diameter - simplifies installation setup by eliminating the need to source a different bit size, reducing preparation time on the job site.

Why This Product

• Built-in crack performance protection - the secondary expansion design addresses one of the most common real-world failure scenarios for concrete anchors, so load capacity is maintained even after cracking occurs at the anchor location.
• Broad application approval in a single anchor - code listing covering cracked concrete, uncracked concrete, masonry, seismic, and high-wind applications means this anchor can be specified confidently across multiple project types without switching products.
• Material compliance at every component - with the nut, washer, and clip each conforming to specific ASTM standards, this anchor meets the material traceability demands of commercial and structural projects where documentation matters.
• Engineered for high-stakes fastening by a trusted anchor manufacturer - Simpson designed the Strong-Bolt 2 specifically for demanding installation conditions, giving specifiers and installers confidence that the anchor performs as intended when the application calls for it most.

Specifications

• Model Number: STB2-75700F10
• Coating/Material: Zinc Plated / Carbon Steel
• Size: 3/4 in. x 7 in.
• Drill Bit Diameter: 3/4 in.
• Thread Length: 4-11/16 in.
• Anchor Body Material: Carbon Steel
• Nut Material: Carbon Steel ASTM A 563, Grade A
• Washer Material: Carbon Steel ASTM F844
• Clip Material: Carbon Steel ASTM A 568
• Packaging: Packs of 10 and Cartons of 40

Approved Applications

• Cracked concrete
• Uncracked concrete
• Masonry applications
• Seismic applications
• High-wind applications

Frequently Asked Questions

Is the Strong-Bolt 2 rated for use in cracked concrete?

Yes. The Strong-Bolt 2 is code listed for use in both cracked and uncracked concrete. Its dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location, maintaining load-carrying performance even as the hole expands.

What drill bit diameter is required to install the STB2-75700F10?

Installation requires a 3/4 in. diameter drill bit, matching the anchor's 3/4 in. diameter.

What materials are used in the construction of this anchor?

The anchor body is carbon steel with a zinc plated finish. The nut is carbon steel conforming to ASTM A 563, Grade A; the washer is carbon steel conforming to ASTM F844; and the clip is carbon steel conforming to ASTM A 568.

Is this anchor suitable for seismic and high-wind applications?

Yes. The Strong-Bolt 2 is specifically designed as an optimal choice for high-performance fastening even in seismic and high-wind conditions, and it is code listed for these demanding environments.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.